Recommended head height differential
Alaris System
®
A. Appropriate head height differential
positioning for secondary bags
For secondary
bags, the
effective head
height is the top
of the fluid level
in the bag.
The top of
the fluid in
the primary
container
should be
approximately
20" above the
top of the Alaris ®
Pump module.
The head height
differential between the
top of the secondary fluid
and the top of the primary
fluid must be at least 91/2."
At the completion of
the secondary dose, the
fluid level in the tubing
equilibrates at this point
(at the top of the fluid
level in primary); no
air is drawn into the
primary line.
20"
Level
with
patient
Recommendations
If necessary, use additional hangers to lower
the primary container to achieve the minimum
91/2" head height differential.
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B. Appropriate head height differential
positioning for secondary bottles
For secondary bottles, the
effective head height is
the top of the fluid level
in the drip chamber.
The top of
the fluid in
the primary
container
should be
approximately
20" above the
top of the Alaris
Pump module.
The head height
differential between
the top of the
secondary fluid in the
drip chamber and the
top of the primary fluid
must be at least 91/2."
20"
Level
with
patient
C. Appropriate head height differential for
intermittent burette delivery
The top of the fluid
in the burette should
be approximately 20"
above the top of the
Alaris Pump module.
Do not allow the
burette to hang below
the pump.
Note: It is important to
close the vent whenever the
burette is inverted to prevent
“wetting” of the vent, which
may cause it to fail. Failure to
vent may manifest itself as a
collapsed burette chamber, rate
inaccuracy, blood flashback
from the venous access device
or upstream occlusion.
20"
Level
with
patient